A can do a piece of work in 8 hours while B alone can do it in 12 hours .Both A and B working together can finish the work in
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A can do a work in 8 hours so A one hour work is one by eight , B can do work in 12 hours so B one hours work will be one by 12 so by this if they both work together so we add 1 by 8 and 1 by 12 so the LCM will be 24 and the answer will be 5 by 24
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